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Full-scale test and simulation of a PBL anchorage system for suspension bridges

机译：悬架桥梁PBL锚固系统的全尺度测试和仿真

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摘要

In suspension bridges, cable anchorage system is the critical structure for cable tension transmission. For traditional rear anchor girder anchorage system and pre-stressed anchorage system, problems such as local compression and inconvenient construction are inevitable. This paper presents the development of a novel PBL anchorage system used in the 4th Nanjing Yangtze River Bridge. This PBL anchorage system adopted grouped perfobond rib shear connectors (known as PBL shear connectors) in the independent perforated steel plate. Two full-scale specimens were extracted from the practical design. The load-slip curves and the strain developments were obtained. The results revealed the reliable load-carrying capacity and very slight residual slip after the cyclic unloading from the design load. The load carried by each row of PBL shear connectors proved the distributed load-carrying capacity. Finite-element analyses were conducted in ANSYS, which agreed well with the test results. Further parametric analyses focusing on the spacing and rows of PBL shear connectors were conducted. Based on the analysis results, the design methods of the PBL anchorage system were suggested.
机译：在悬架桥梁中，电缆锚固系统是电缆张力传动的关键结构。对于传统的后锚梁锚固系统和预应力的锚固系统，局部压缩和不方便的结构等问题是不可避免的。本文介绍了在南京长江桥第4座新型PBL锚固系统的开发。该PBL锚固系统采用独立的穿孔钢板采用分组的Percobond肋剪切连接器（称为PBL剪切连接器）。从实用的设计中提取了两个全尺寸标本。获得了负载滑移曲线和应变发展。结果显示，从设计负荷循环卸载后，可靠的负载承载能力和非常轻微的残余滑动。每行PBL剪切连接器承载的负载证明了分布式承载能力。有限元分析在ANSYS中进行，这与测试结果很好。进行了专注于间距和行剪切连接器的间隔和行的进一步参数分析。基于分析结果，提出了PBL锚固系统的设计方法。

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